Effects of including chopped alfalfa hay in barley-based total mixed rations on production and rumen fermentation of lactating dairy cows

2005 ◽  
Vol 85 (2) ◽  
pp. 251-253 ◽  
Author(s):  
M. S. Einarson ◽  
J. C. Plaizier ◽  
K. M. Wittenberg
Keyword(s):  
Milk Fat ◽  
Dry Matter ◽  
Barley Grain ◽  
Rumen Ph ◽  
Lactating Dairy Cows ◽  
Alfalfa Hay ◽  
Penn State ◽  
Alfalfa Silage ◽  
Particle Separator ◽  
Barley Silage

Alfalfa silage [13.6% dry matter (DM)] was replaced with chopped alfalfa hay in barley silage and barley-grain-based total mixed rations. This replacement increased DM from 45.2 to 54.9%, decreased physical effective fibre, determined as the proportion of the DM passing through the 8- and 19-mm screens of the Penn State Particle Separator multiplied by dietary neutral detergent fibre (peNDF), from 21.9 to 16.2% DM, increased dry matter intake from 19.1 to 21.2 kg d-1, numerically reduced milk protein yield from 1.01 to 0.93 kg d-1, but did not affect milk yield, milk fat, rumen pH, and rumen ammonia. Key words: Alfalfa silage, chopped alfalfa hay, milk production, feed intake

The effect of ammoniated and roasted barley on rumen pH, milk yield and milk composition of lactating dairy cows

2003 ◽  
Vol 2003 ◽  
pp. 107-107
Author(s):  
M. H. Fathi ◽  
A. Nikkhah
Keyword(s):  
Dairy Cows ◽  
Milk Yield ◽  
Milk Fat ◽  
Dry Matter ◽  
Metabolic Disorders ◽  
Milk Composition ◽  
Barley Grain ◽  
Nutrient Requirements ◽  
Rumen Ph ◽  
Lactating Dairy Cows

Cereal grains can provide the major source of energy in diets in order to meet the nutrient requirements of high producing dairy cows. However the amount of starch that can be included in the diets of dairy cows is limited particularly if starch is rapidly fermented such as barley starch. Reduction of feed intake, rumen pH, milk fat test, microbial growth and other metabolic disorders are expected if ruminally degradable starch is fed in amount that cant be efficiently metabolized by rumen microbs. Various techniques for processing barley grain have been developed to decrease the degradability of dry matter in rumen without reducing its extent of digestion. McNiven (1995) showed roasting of barley is more effective treatment. The objective of this experiment was to study of effects the roasting and ammoniation of barley grain on rumen pH, feces pH, milk yield and milk composition in dairy cows.

Precision processing barley grain did not affect productivity of lactating dairy cows

2013 ◽  
Vol 93 (2) ◽  
pp. 261-268 ◽  
Author(s):  
N. Schlau ◽  
L. Duineveld ◽  
W. Z. Yang ◽  
T. A. McAllister ◽  
M. Oba
Keyword(s):  
Dairy Cows ◽  
Milk Fat ◽  
Nitrogen Concentration ◽  
Latin Square ◽  
Barley Grain ◽  
Nutrient Digestibility ◽  
Ruminal Fermentation ◽  
Kernel Size ◽  
Lactating Dairy Cows ◽  
Barley Silage

Schlau, N., Duineveld, L., Yang, W. Z., McAllister, T. A. and Oba, M. 2013. Precision processing barley grain did not affect productivity of lactating dairy cows. Can. J. Anim. Sci. 93: 261–268. This study evaluated the effects of precision processing (PP; processing based on kernel size) barley grain on ruminal fermentation and productivity of lactating dairy cows. Twenty multiparous Holstein cows, including eight ruminally cannulated cows, were used in a replicated 4×4 Latin square design with 21-d periods. Diets contained light barley grain processed precisely using a narrow roller setting (LB), heavy barley processed precisely using a wide roller setting (HB), processed HB and LB mixed at equal proportions (PP), or equal parts of light and heavy barley grain processed at a single narrow roller setting (CON). All diets consisted of 40% barley grain, 40% barley silage, and 20% of a supplement premix. Comparisons were made between LB and HB to evaluate the effect of barley quality, and between PP and CON to evaluate the effect of precision processing. Dry matter intake, sorting index, ruminal fermentation characteristics, and nutrient digestibility were not affected by diet. In addition, milk yield and concentrations of milk fat, protein, and lactose were not different, although milk urea nitrogen concentration was greater for PP vs. CON and for LB vs. HB. These results suggest that precision processing barley grain based on kernel size may not drastically affect ruminal fermentation and milk production in lactating dairy cows.

Morning vs. evening feed delivery for lactating dairy cows

2011 ◽  
Vol 91 (1) ◽  
pp. 113-122 ◽  
Author(s):  
A. Nikkhah ◽  
C. J. Furedi ◽  
A. D. Kennedy ◽  
S. L. Scott ◽  
K. M. Wittenberg ◽  
...  
Keyword(s):  
Blood Glucose ◽  
Dairy Cows ◽  
Feed Intake ◽  
Milk Fat ◽  
Dry Matter ◽  
Rumen Fermentation ◽  
Feed Consumption ◽  
Delivery Time ◽  
Rumen Ph ◽  
Lactating Dairy Cows

Nikkhah, A., Furedi, C. J., Kennedy, A. D., Scott, S. L., Wittenberg, K. M. Crow, G. H. and Plaizier, J. C. 2011. Morning vs. evening feed delivery for lactating dairy cows. Can. J. Anim. Sci. 91: 113–122. A study was conducted to investigate the effects of changing feed delivery time from morning (0900) to evening (2100) on feed intake, diurnal feed intake patterns, digestion, rumen fermentation, milk production and composition, as well as on several blood metabolites. Eight (four ruminally cannulated) lactating Holstein cows, consisting of four primiparous and four multiparous cows, were used in the study. The change in the time of feed delivery increased the proportion of feed consumed within 3 h of feed delivery in all cows (54.7 vs. 46.3±4.1%, means±SE, P=0.05), but increased daily dry matter intake only in primiparous cows (18.5 vs. 20.4±0.7 kg d−1, P=0.05). Average daily concentrations of blood glucose, lactate, urea and β-hydroxybutyrate (BHBA) as well as rumen pH and concentrations of volatile fatty acids (VFA) were not affected by feed delivery time. However, rumen pH was lower (P<0.05), at 5 and 6 h after feed delivery, while total rumen VFA and acetate were higher (P<0.05) only at 6 h after feed delivery in cows fed in the evening. Also, compared with feed delivery at 0900, feeding cows at 2100 resulted in lower (P<0.05) blood glucose and urea at 2 h after feed delivery, and increased BHBA (P<0.05) at 4 and 6 h after feed delivery. Cows fed at 2100 tended to produce more milk fat than those fed at 0900 (1.11 vs. 0.97±0.07 kg d−1, P=0.08). Milk yield and milk protein were not affected by the time of feed delivery. Changing the feed delivery time from morning to evening increased apparent total tract digestibility of dry matter, nitrogen, and neutral detergent fibre. The results of this study suggest that changing time of feed delivery from 0900 to 2100 increases feed consumption within 3 h after this delivery and rumen fermentation within 6 h after this delivery, changes diurnal patterns of glucose, urea and BHBA in peripheral blood, tends to increase milk fat, and increases nutrient digestibilities.

scholarly journals Particle Size Influences Preferential Consumption of Hay and Baleage in Total Mixed Dairy Rations

2008 ◽  
Vol 42 (2008) ◽  
pp. 45-49
Author(s):  
Yedilaklil Hunde ◽  
Jamie Patton ◽  
Dennis Padgitt ◽  
David Vlieger
Keyword(s):  
Particle Size ◽  
Milk Fat ◽  
State University ◽  
Fiber Concentration ◽  
Lactating Cows ◽  
Balanced Diet ◽  
Alfalfa Hay ◽  
Penn State ◽  
Nutritional Needs ◽  
Particle Separator

Lactating cows require complete balanced rations to meet their high nutritional requirements and to maximize milk and milk fat production. Total mixed rations (TMR) were developed to meet these nutritional needs by thoroughly mixing necessary feedstuffs into a single ration; hence providing a balanced diet in each bite. However, the actual nutrient and fiber concentration consumed by cows can dramatically differ from that of the ration due to selective feeding. The objectives of this study were to 1) evaluate the palatability of alfalfa hay TMR and alfalfa baleage TMR and 2) determine the effect of TMR fiber sources on the preferential sorting of rations. Sixty-four lactating dairy cows at the R.T. Wright University Farm at Northwest Missouri State University, Maryville, Missouri, were fed TMR containing either 35 percent alfalfa baleage or 35 percent alfalfa hay. Fresh TMR was weighed and distributed evenly within the feed bunk every 24 hours and orts (unconsumed feedstuffs) were collected and weighed to determine the amount of feed consumed. Feed samples from the bulk ration and arts mixture were collected for analysis of particle size distribution via a Penn State Particle Separator. Results indicate the cows clearly preferred shorter (&lt; 0.79 cm) feed particles in both the baleage TMR and hay TMR. In addition, the cows preferred and consumed more alfalfa baleage TMR than alfalfa hay TMR. No relationships between moisture content and TMR preference were identified.

PSIV-12 Effects of feeding a novel alfalfa leaf pellet product (ProLEAF MAX™) and alfalfa stems (ProFiber Plus™) on production of lactating dairy cows

2021 ◽  
Vol 99 (Supplement_3) ◽  
pp. 294-294
Author(s):  
Laura A Smith ◽  
Allen Y Young ◽  
Chris Pratt ◽  
Kara J Thornton
Keyword(s):  
Dairy Cows ◽  
Milk Yield ◽  
Milk Fat ◽  
Dry Matter ◽  
The Other ◽  
Dry Matter Intake ◽  
Lactating Dairy Cows ◽  
Alfalfa Hay ◽  
Milk Components ◽  
Alfalfa Leaf

Abstract Alfalfa is a commonly grown forage in the Intermountain west and is often included in lactating dairy cow rations. This study investigated the effects of including novel alfalfa products: ProLEAF MAX™ (PLM), an alfalfa leaf pellet; and ProFiber Plus™ (PFP), alfalfa stems, in the diet of lactating dairy cows on dry matter intake, milk yield, and milk components. Holstein cows were housed in a freestall barn and milked in a free-flow automatic milking system. All cows were fed each treatment for 21-days, then switched to the next treatment utilizing a crossover experimental design. The five treatments were: control (CON, typical diet including alfalfa hay; n = 65); low-quality alfalfa hay (LQ+PLM, a diet that replaced alfalfa hay with low-quality alfalfa hay and PLM; n = 62); PLM+PFP (a diet that replaced alfalfa hay with PLM and PFP; n = 65); PLM (a diet that replaced alfalfa hay with PLM; n = 62); and PFP (a diet that replaced alfalfa hay with PFP; n = 60). Cows were group fed a partial mixed ration balanced for 40.8 kg milk, 3.9% milk fat and 3.3% milk protein. Individual milk yield and milk components were recorded daily by the automatic milking system. Dry matter intake was also recorded daily. When fed the PFP diet, cows had decreased (P &lt; 0.01) dry matter intake compared to the other diets. Milk yield was increased (P &lt; 0.01) when cows received the PLM diet when compared to the other diets. When fed the PFP and PLM+PFP diets, milk fat was increased (P &lt; 0.01) when compared to the other diets. Milk protein was decreased (P &lt; 0.01) when cows were fed the PFP diet when compared to the other diets. These data indicate that inclusion of fractionated alfalfa products in the diet of lactating dairy cows has the potential to increase milk yield and milk components.

The effect of compound composition and silage characteristics on silage intake, feeding behaviour, production of milk and live-weight change in lactating dairy cows

1991 ◽  
Vol 52 (1) ◽  
pp. 11-19 ◽  
Author(s):  
D. A. Jackson ◽  
C. L. Johnson ◽  
J. M. Forbes
Keyword(s):  
Dairy Cows ◽  
Weight Change ◽  
Milk Fat ◽  
Feeding Behaviour ◽  
Dry Matter ◽  
Live Weight ◽  
Productive Performance ◽  
Lactating Dairy Cows ◽  
Principal Energy ◽  
Friesian Cows

ABSTRACTAn experiment was carried out to investigate the effects of compound composition and silage characteristics on silage intake, feeding behaviour and productive performance of dairy cows during the first 25 weeks of lactation. Over a period of 3 years, 36 lactating British Friesian cows (12 per year), in their third or later lactations, were divided into two groups. The cows in each group received either compound S, in which the principal energy source was cereal starch, or compound F containing a mixture of high quality digestible fibre. Cows given compound F ate 2·2 kg more silage dry matter per day (P < 0·05). The type of compound had no effect on the frequency of silage feeding and the time spent eating was significantly different only over weeks 10 to 25 of lactation (P < 0·05), with cows on compound F spending on average 20 min longer feeding per day. Cows on compound F produced 1·7 kg more milk per day than cows on compound S. Although there were no significant differences in the concentration of milk constituents, compound F was associated with higher yields of milk constituents. Significant differences were found between the years of experiment in the frequency of feeding (P < 0·05) and also in the concentration of milk protein and milk fat. There were no significant differences in the magnitude of live-weight change between treatments or year of experiment.

Effect of maceration of bromegrass-alfalfa silage on ruminal degradability and performance of lactating dairy cows

2006 ◽  
Vol 86 (2) ◽  
pp. 311-315
Author(s):  
D. R. Ouellet ◽  
H. Lapierre ◽  
J. Chiquette
Keyword(s):  
Dry Matter ◽  
Degradation Kinetics ◽  
Limited Effect ◽  
Lactating Dairy Cows ◽  
Lactational Performance ◽  
Gross Energy ◽  
Ruminal Degradation ◽  
Ruminal Degradability ◽  
Alfalfa Silage ◽  
And Performance

Maceration of bromegrass-alfalfa sward increased effective ruminal degradability of dry matter, neutral detergent fibre, and gross energy, but decreased the degradability of protein. Despite improvement in ruminal degradation kinetics, inclusion of the macerated silage (43% of total mixed ration dry matter) between weeks 7 and 15 of lactation had limited effect on lactational performance. Key words: Forage, silage, maceration, rumen degradability, lactation

Persistency of milk trans-18:1 isomers and rumenic acid in Holstein cows over a full lactation

2011 ◽  
Vol 91 (1) ◽  
pp. 147-167 ◽  
Author(s):  
Riazuddin Mohammed ◽  
Reza Khorasani ◽  
Laksiri Goonewardene ◽  
John Kramer ◽  
John Kennelly
Keyword(s):  
Fatty Acids ◽  
Milk Fat ◽  
De Novo ◽  
Vaccenic Acid ◽  
Methyl Esters ◽  
Control Diet ◽  
Barley Grain ◽  
Holstein Cows ◽  
Test Diet ◽  
Barley Silage

Mohammed, R., Khorasani, R. G., Goonewardene, L. A., Kramer, J. K. G. and Kennelly, J. J. 2011. Persistency of milk trans-18:1 isomers and rumenic acid in Holstein cows over a full lactation. Can. J. Anim. Sci. 91: 147–167. A long-term lactation study was undertaken to determine whether the previously reported short-term persistency in vaccenic acid [VA; trans(t)11-18:1] and rumenic acid (RA) could be maintained. To test this hypothesis, 24 Holstein cows were allotted to two experimental diets (control and test) from 2 wk before calving until they were 270 d in milk (DIM). The test diet was similar to the control diet, but supplemented with sunflower seed (11.2% diet DM), fish oil (0.5%) and monensin (22 mg/kg DM) by replacing an equivalent amount of barley grain. The forage: concentrate ratio was 50:50 (DM basis) with 35% barley silage and 15% alfalfa hay. Milk was sampled every fortnight from the start of lactation until cows were 270 DIM. Data obtained were averaged into three equal periods of 90 d each, representing three stages of lactation (SOL): early-lactation (EL), mid-lactation (ML) and late-lactation (LL). Dry matter intakes were not different between treatments with greater intakes observed during ML than during EL or LL. Milk yield was not different between treatments and decreased with increasing DIM. Milk fat content and yield showed interaction between treatment and SOL with lower values observed for the test diet than control diet during EL and ML. De novo synthesized fatty acids (4:0–15:0), 16:0–16:1 and preformed fatty acids (17:0 and above) showed interaction between treatment and SOL with the former two being greater for control diet than test diet and the latter greater for the test diet than control diet within each SOL. Milk t10-18:1 (% fatty acid methyl esters, FAME) was greater for the test diet compared with control diet (4.38 vs. 1.32) and was greater during ML (3.79) than during EL (2.38) or LL (2.38). Milk VA and RA showed interactions between treatment and SOL with greater values observed for the test diet than the control diet within each SOL. When analyzed by treatment, milk VA was not different across SOL for both diets. Milk RA was not different across SOL for the test diet, but was different for the control diet; it was lower during EL than during ML. Step-wise regression analysis revealed that the variability in milk RA for the control diet (P<0.01; R2=0.97) was determined by VA (70%) and RA/VA (27%); and for the test diet (P<0.01; R2=0.987) by VA (88.7%), RA/VA (5%) and t10-18:1 (3.8%). Desaturase index based on RA/VA showed an interaction between treatment and SOL; it was greater for the control diet than the test diet within each SOL. Overall findings revealed that the differences in milk t10- and VA across SOL reflected possible differences in starch and PUFA intakes, respectively. Differences in milk RA across SOL for the control diet could be attributed to possible differences in mammary desaturase activity based on differences in RA/VA.

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